//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Reid Spencer and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
+#if HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
#if HAVE_SIGNAL_H
#include <signal.h>
#endif
return Path();
// Now we have a colon separated list of directories to search; try them.
- unsigned PathLen = strlen(PathStr);
+ size_t PathLen = strlen(PathStr);
while (PathLen) {
// Find the first colon...
const char *Colon = std::find(PathStr, PathStr+PathLen, ':');
return Path();
}
-static bool RedirectFD(const std::string &File, int FD, std::string* ErrMsg) {
- if (File.empty()) return false; // Noop
+static bool RedirectIO(const Path *Path, int FD, std::string* ErrMsg) {
+ if (Path == 0)
+ // Noop
+ return false;
+ std::string File;
+ if (Path->isEmpty())
+ // Redirect empty paths to /dev/null
+ File = "/dev/null";
+ else
+ File = Path->toString();
// Open the file
int InFD = open(File.c_str(), FD == 0 ? O_RDONLY : O_WRONLY|O_CREAT, 0666);
Timeout = true;
}
+static void SetMemoryLimits (unsigned size)
+{
+#if HAVE_SYS_RESOURCE_H
+ struct rlimit r;
+ __typeof__ (r.rlim_cur) limit = (__typeof__ (r.rlim_cur)) (size) * 1048576;
+
+ // Heap size
+ getrlimit (RLIMIT_DATA, &r);
+ r.rlim_cur = limit;
+ setrlimit (RLIMIT_DATA, &r);
+#ifdef RLIMIT_RSS
+ // Resident set size.
+ getrlimit (RLIMIT_RSS, &r);
+ r.rlim_cur = limit;
+ setrlimit (RLIMIT_RSS, &r);
+#endif
+#ifdef RLIMIT_AS // e.g. NetBSD doesn't have it.
+ // Virtual memory.
+ getrlimit (RLIMIT_AS, &r);
+ r.rlim_cur = limit;
+ setrlimit (RLIMIT_AS, &r);
+#endif
+#endif
+}
+
int
Program::ExecuteAndWait(const Path& path,
const char** args,
const char** envp,
const Path** redirects,
unsigned secondsToWait,
+ unsigned memoryLimit,
std::string* ErrMsg)
{
if (!path.canExecute()) {
case 0: {
// Redirect file descriptors...
if (redirects) {
- if (redirects[0]) {
- if (redirects[0]->isEmpty()) {
- if (RedirectFD("/dev/null",0,ErrMsg)) { return -1; }
- } else {
- if (RedirectFD(redirects[0]->toString(), 0,ErrMsg)) { return -1; }
- }
- }
- if (redirects[1]) {
- if (redirects[1]->isEmpty()) {
- if (RedirectFD("/dev/null",1,ErrMsg)) { return -1; }
- } else {
- if (RedirectFD(redirects[1]->toString(),1,ErrMsg)) { return -1; }
- }
- }
+ // Redirect stdin
+ if (RedirectIO(redirects[0], 0, ErrMsg)) { return -1; }
+ // Redirect stdout
+ if (RedirectIO(redirects[1], 1, ErrMsg)) { return -1; }
if (redirects[1] && redirects[2] &&
- *(redirects[1]) != *(redirects[2])) {
- if (redirects[2]->isEmpty()) {
- if (RedirectFD("/dev/null",2,ErrMsg)) { return -1; }
- } else {
- if (RedirectFD(redirects[2]->toString(), 2,ErrMsg)) { return -1; }
+ *(redirects[1]) == *(redirects[2])) {
+ // If stdout and stderr should go to the same place, redirect stderr
+ // to the FD already open for stdout.
+ if (-1 == dup2(1,2)) {
+ MakeErrMsg(ErrMsg, "Can't redirect stderr to stdout");
+ return -1;
}
- } else if (-1 == dup2(1,2)) {
- MakeErrMsg(ErrMsg, "Can't redirect");
- return -1;
+ } else {
+ // Just redirect stderr
+ if (RedirectIO(redirects[2], 2, ErrMsg)) { return -1; }
}
}
+ // Set memory limits
+ if (memoryLimit!=0) {
+ SetMemoryLimits(memoryLimit);
+ }
+
// Execute!
if (envp != 0)
- execve (path.c_str(), (char** const)args, (char**)envp);
+ execve (path.c_str(), (char**)args, (char**)envp);
else
- execv (path.c_str(), (char** const)args);
+ execv (path.c_str(), (char**)args);
// If the execve() failed, we should exit and let the parent pick up
// our non-zero exit status.
exit (errno);
// Wait for child to die
if (wait(&status) != child)
MakeErrMsg(ErrMsg, "Child timed out but wouldn't die");
-
+ else
+ MakeErrMsg(ErrMsg, "Child timed out", 0);
+
return -1; // Timeout detected
- } else {
+ } else if (errno != EINTR) {
MakeErrMsg(ErrMsg, "Error waiting for child process");
return -1;
}